StDB - a debugger for STX

Overview

StDB is a debugger for the Streaming Transformations for XML (STX).
STX is a one-pass transformation language for XML documents that builds on the
Simple API for XML (SAX). STX is intended as a high-speed, low memory consumption
alternative to XSLT. Joost is thereby the underlying processor for STX (Joost).
The processor as well as the debugger are completly written in Java.
Further information could be found here.